Ch 4 -
Face & Neck Development
Face & Neck Development
It is considered the first event in the development of the face.
What is the disintegration of the oropharyngeal membrane?
The structure on the dorsum of the tongue where the thyroid gland originated during embryonic development
What is the foramen cecum?
The enamel organ, dental papilla, and dental sac/follicle
What are the components of the tooth germ?
The crystalline structural unit of enamel
What is an enamel rod/enamel prism?
The slight depression seen clinically between the marginal gingival and attached gingival tissues
What is the free gingival groove?
The cartilage found within the 1st pharyngeal / branchial arch
What is Meckel cartilage?
The embryonic structures which originally grow vertically but will flip up and fuse to become the secondary palate
What are the palatal shelves or lateral palatine processes?
The Tomes process
What is the region of the ameloblast that will secrete the enamel matrix?
Enamel loss due to friction caused by extreme toothbrushing
What is abrasion?
The nonkeratinized tissue below the interproximal contact of adjacent teeth
What is the col?
The philtrum, maxillary incisors, primary palate, nasal septum, intermaxillary segment
What are structures formed by fusion of the medial nasal processes?
The embryonic structure that will become the body (anterior 2/3) of the tongue
What are lateral lingual swellings?
The faulty development of enamel which causes less enamel to form and results in horizontal lines of pitting and grooves
What is enamel hypoplasia?
Enamelins, amelogenins, and ameloblastins
What are the proteins found in enamel?
What is 4 to 6 days?
What is the turnover time of the junctional epithelium?
A specialized thickened area of ectoderm which will develop into a sensory organ
What is a placode?
Embryonic tissue which is formed from mesoderm and neural crest cells and will become connective tissue within the head and neck region
What is ectomesenchyme?
The compressed layers of the enamel organ which are present on the surface of the tooth during its eruption
What is the reduced enamel epithelium?
The location where enamel formation begins on the tooth surface?
Where is the incisal or occlusal surface of the tooth?
Tooth position, abfraction, periodontal disease, abrasion, thinner gingival phenotype
What are causes of gingival recession?
The week in which facial development begins prenatally
What is the 4th week of prenatal development?
The structure that grows inferiorly and will eventually separate the nasal cavities and fuse with the final palate
What is the nasal septum?
The acronym is HERS
What is Hertwig epithelial root sheath?
pH is 5.5
What is the pH at which enamel dissolves?
Calcium channel blockers, immunosuppressants, and anti-seizure medications
What are the three most common types of medications that may cause gingival hyperplasia?